GRAPHICAL AND VISIBLE VISUALIZATION OF WIND FORCE EFFECT FOR BROILER HOUSE

Abstract

Two sets of experiments were carried out to study wind-induced natural ventilation process (wind force) through two different types of fabricated physical models namely (A and B) and simulating broiler houses inside a wind tunnel. The first set as the main experiments that used wind pressure difference method to determine and calculate wind pressure coefficients, airflow rates, and ventilation coefficients under four wind angles (0.0, 30, 60 and 90°) and two wind velocities (2.5 and 3.6m/s) for two different types of studied models differ in configurations. Graphical visualization for inlet and outlet zones were presented on the plan view of the physical model.The second set was the auxiliary experiments that implemented to visualize the inlet and outlet zones by using smoke around the models envelope. The results demonstrated that, the highest mean values of wind pressure coefficients on windward wall for models A and B were obtained at wind angle of 90o and wind velocity of 3.6m/s. However, the mean value of wind pressure coefficient on the windward wall for model-B was higher than that of model-A by about 63.55%. Also, the maximum value of ventilation rate was 0.2134m3/s at wind angle of 60o and 3.6m/s wind velocity for model-B. While, the highest value of ventilation coefficient was 0.8 at 90o wind angle and 2.5m/s wind velocity for model-B. Comparative study between the two tested physical models, showed that, model-B was found to be the most adequate for uniformity the airflow shape.